| Bright Accounting Ltd | Professional & scientific | 2014 |
| Bright Flight Limited | Information & communication | 2011 |
| Brighter Surveyors Limited | Professional & scientific | 2020 |
| Brightling Limited | Construction | 1992 |
| Brillopak Limited | Manufacturing | 2001 |
| Brio Research and Consulting Limited | Professional & scientific | 2015 |
| Brite Light Electrical Limited | Construction | 2014 |
| Broad Signs Limited | Professional & scientific | 2003 |
| Broadhurst Clarkson & Fuller Limited | Extraterritorial | 2016 |
| Broadwater Motors Ltd | Wholesale & retail | 2017 |
| Broadway Pharmacy Limited | Wholesale & retail | 2003 |
| Brockman Build Ltd | Construction | 2025 |
| BROCKWELL1 Limited | Financial services | 2015 |
| Brogue Investments Ltd | Other services | 2018 |
| Bromia Developments Limited | Real estate | 2019 |
| Bromia Ltd | Professional & scientific | 2020 |
| Brook Heritage Investments Limited | Real estate | 2025 |
| Brook House Medical Ltd | Information & communication | 2015 |
| Brook Place Management Company Limited | Households | 2024 |
| Brook Roberts Limited | Professional & scientific | 2013 |
| Brookhaven Care Limited | Health & social care | 2019 |
| Brooks & Co Developments Limited | Construction | 2017 |
| Brookside (East Peckham) Limited | Administrative & support | 2003 |
| Broom Waters Managed Land Limited | Households | 1994 |
| Broughton JIU Jitsu Solutions Ltd | Other services | 2023 |
| Brunel Planning Ltd | Professional & scientific | 2014 |
| Bruno Scaffold Alarms Ltd | Other services | 2024 |
| Brush UP Domestic Services Ltd | Extraterritorial | 2014 |
| BS Property Park Ltd | Administrative & support | 2017 |
| Bs&T Marketing Limited | Professional & scientific | 2016 |
| Bsrb Limited | Extraterritorial | 2009 |
| Btkj Enterprise Ltd | Health & social care | 2020 |
| Bubba Gray Ltd | Construction | 2025 |
| Buckmarks Limited | Professional & scientific | 2023 |
| Build-Pro Construction Limited | Construction | 2012 |
| Build-Rite Building Services Limited | Construction | 2003 |
| Building Passport Limited | Information & communication | 2019 |
| Building Services Group Limited | Professional & scientific | 1987 |
| Bulk Freight London Ltd | Administrative & support | 2017 |
| Bullpen Commercial Property Limited | Real estate | 2023 |
| Bumble Bees Private Day Nursery School Ltd | Health & social care | 2023 |
| Bumble Construction Limited | Construction | 2016 |
| Bumps & Burpees Ltd | Administrative & support | 2019 |
| Burlow Limited | Construction | 2020 |
| Burnhill Freehold Limited | Households | 2014 |
| Burnhill Kitchens Installations Ltd | Construction | 2021 |
| Burnhill Kitchens Limited | Manufacturing | 2002 |
| Burns & Co (Accountants) Limited | Professional & scientific | 2009 |
| Burrhaven LLP | | 2021 |
| Burtons Direct Limited | Manufacturing | 2013 |
| Burtons Grooming Direct Ltd | Extraterritorial | 2016 |
| Burtons Manufacturing Company Limited | Manufacturing | 2013 |
| Burtons Medical Equipment Limited | Manufacturing | 1986 |
| Burtons of Maidstone Limited | Financial services | 2000 |
| Burtons Vehicle Systems Limited | Transport & logistics | 2013 |
| Burtons Veterinary Products Limited | Professional & scientific | 1997 |
| Business Cover UK Ltd | Financial services | 2020 |
| Bute PVT Ltd | Real estate | 2022 |
| Butler Healthcare Support Ltd | Health & social care | 2025 |
| BUX & Bewl Communications Limited | Professional & scientific | 2015 |
| BV Recruitment Ltd | Administrative & support | 2009 |
| Bveoa | Other services | 2021 |
| BW Accounts Ltd | Professional & scientific | 2011 |
| BX5 Services Ltd | Administrative & support | 2017 |
| Byron Road Management Company Limited | Households | 1994 |
| C & J Fieldwork Partnership LLP | | 2008 |
| C & S Gents Barbers Ltd | Other services | 2019 |
| C Birkby Electrical Ltd | Construction | 2016 |
| C Green Solutions Ltd | Construction | 2021 |
| C I Express Drive Ltd | Transport & logistics | 2018 |
| C J Matthews Ltd | Energy | 2024 |
| C M J Holdings Limited | Wholesale & retail | 2002 |
| C Palace Living Limited | Construction | 2015 |
| C.J.C. Consultancy Limited | Real estate | 1983 |
| C.K. Coffee Limited | Wholesale & retail | 1989 |
| C.K. Office Services Ltd. | Wholesale & retail | 2006 |
| C.L.G. Bungalows Limited | Households | 1992 |
| C.S.P. Plumbing & Heating Limited | Construction | 2008 |
| CAB Boom Ltd | Construction | 2020 |
| CAB Boom Property Management Ltd | Real estate | 2024 |
| Cabasse Consulting Ltd | Professional & scientific | 2021 |
| Cable Tech Services Ltd | Construction | 2019 |
| Cacahuete Ltd | Wholesale & retail | 2017 |
| Cachesure Ltd | Extraterritorial | 2012 |
| Caidig Ltd | Information & communication | 2026 |
| Cakeybake Ltd | Hospitality | 2011 |
| Caldera IT Limited | Professional & scientific | 2004 |
| Callis Admin Ltd | Administrative & support | 2017 |
| Calm & Gentle Dental Care, Rustington Limited | Health & social care | 2015 |
| Calm & Gentle Dental Care, Tonbridge Limited | Health & social care | 2007 |
| Calverley Enterprises Limited | Administrative & support | 2008 |
| Camblaye Estates Ltd | Construction | 2019 |
| Came Automation Limited | Construction | 1992 |
| Cameya Limited | Real estate | 2016 |
| Camp Hill Estates Limited | Real estate | 2017 |
| Campbell International Ltd | Manufacturing | 2002 |
| Campusoxide Solutions Limited | Education | 2026 |
| Candamill NO.2 Creditors Partnership | | 1999 |
| Candy Metals Limited | Other services | 2012 |
| Canham Aggregates Ltd | Administrative & support | 2023 |